双光窗夹套式红外反射薄层电化学池的制作与表征

Fabrication and Evaluation of a Double Transparent Windows, Double-walled IR Reflected Thin Layer Electrochemical Cell

设计制作了一种适合水体系和非水体系的双光窗夹套式红外反射薄层电化学池。以亚铁氰化钾水溶液和邻苯二酚、对苯二酚的乙腈溶液对此电化学池进行电化学表征。结果表明 ,该电化学池的阻抗效应和边缘效应得到最大程度的抑制。以亚铁氰化钾水溶液进行现场红外光谱电化学表征 ,氧化过程的谱图中能清楚地观察到 ,Fe(CN) 4 -6中 CN 的正向吸收峰与Fe(CN) 3 -6中 CN 的负向吸收峰 ,结果与文献报道一致。以液氮冷却的N2 气为致冷剂做对苯二酚的低温现场红外光谱电化学实验 ,也获得了信噪比较好 ,谱峰清晰的氧化还原谱图。

A double transparent window, double-walled IR reflected thin layer electrochemical cell is described. The cell is fit for both aqueous system and non-aqueous system. The results of electrochemical evaluation of K 4Fe(CN) 6 aqueous solution and catechol、hydroquinone in acetonitrile solution showed that the impedance effect and edging effect of the cell could be controlled to a great degree. In the spectra of in-situ FTIR spectroelectrochemical evaluation for cell in aqueous K 4Fe(CN) 6 solution, the negative-going CN peak of Fe(CN) 3- 6 and the positive-going CN peak of Fe(CN) 4- 6 were observed clearly during the oxidation process, in accordance with that reported in literatures. Meanwhile, at the low-temperature in-situ FTIR spectroelectrochemical experiment of hydroquinone in acetonitrile solution using liquid N 2 as refrigerant the clear redox IR spectra with good signal-noise ratio were also obtained.